WIKIUSERNAME -- your Wiki username with web prefix
Your %WIKINAME% with Main web prefix, useful to point to your Foswiki home page
Syntax: %WIKIUSERNAME%
Expands to: Main.FoswikiGuest, renders as FoswikiGuest
When used in a template topic, this macro will be expanded when the template is used to create a new topic. See TemplateTopics#TemplateTopicsVars for details